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1. Everyone should find their own seat. The person leading the activity should remind everyone that the seats (and piles of equipment) have been set out so everyone will be safe.

2. The person leading the activity should explain that the night sky is full of different things, from stars and planets to satellites. There's a limit to what the naked eye can see (and elements such as lights from a town or city can also limit what the eye can see). People use telescopes to be able to see more.

Make a telescope

1. Draw two parallel lines from the top of one of the tubes to the bottom. The lines should be one centimetre apart.

2. Use scissors to cut along the lines and remove a strip of the tube.

3. Put the tube with the strip missing into the other tube. Squeeze the tube with the strip missing together slightly to make it fit, then check that it moves up and down the inside of the tube without catching on anything.

If the inner tube catches and won't slide freely, cut another (thin) strip from it and then try again. Be careful to keep the inside of the telescope as dark as possible.

Once the inner tube's a perfect fit, tape it back together with black tape then try the sliding action again.

Try to place the tape evenly on the inside of the inner tube so it keeps its shape and doesn't catch in the outer tube.

1. Place the smaller, taped tube on a sheet of card and draw around the end with a pen or pencil.

2. Use a ruler to draw a cross in the circle.

3. Put the one centimetre concave lens in the centre of the circle and draw around it.

4. Cut the larger circle out then use a craft knife to carefully cut out the smaller circle from the centre.

An adult should supervise everyone from a safe distance as they do this.

1. Brush some glue around the edges of the small hole in the circle.

2. Find the flat side of the one centimetre concave lens. Push the lens into the hole so that it sticks there with the flat side facing up. Wipe away any excess glue.

3. Brush some glue around the edges of one end of the smaller, taped tube.

4. Push the circle of card with the concave lens into the tube so that it sticks with the flat side facing up.

Leave it to dry with the lens facing down so the lens can't drop out and break.

1. Once the glue's dried, carefully tape over any joins with the black tape to keep any light out.

2. Brush some glue around the edges of one end of the other tube. Take the one and a half inch lens and gently push it into the tube so that it sticks. Wipe away any excess glue.

Again, leave this to dry with the lens facing down so the lens can't drop out and break.

Once the glue's dried, decorate the telescope. You could use paint, pens, stickers, or other craft materials.

It's up to you what you use and what design you'll aim for. You could make them look like real life telescopes with complicated dials and panels or come up with a new telescope design. It may depend on how much time you have.

Discover the stars

1. Everyone should take the telescopes outside and find a space two metres apart from everyone else.

2. Everyone should look through their telescope and see which stars they can find.

3. The person leading the activity could challenge everyone to find specific things like constellations, satellites, or the North Star.

Make sure you can see anything you're challenging people to find.

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Everyone should find their own seat. The person leading the activity should remind everyone that the seats (and piles of equipment) have been set out so everyone will be safe. The person leading the activity should explain that the night sky is full of different things, from stars and planets to satellites.

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Build your rocket

1. Everyone should get into small groups. Give each group a bottle, tape and three straws.

2. The straws should be taped to the top of the bottle, so they act like a stand for the upside-down bottle. Wrap tape around the bottle to secure them in place, without bending the straws.

3. Everyone should get some cardboard and use a pencil to draw four rocket fins and cut them out with scissors. Stick these to the sides of the bottle with tape.

Each group should think carefully about the shape of their fins and how they'll affect the flight of their rocket. Examples can be found online if anyone needs extra help.

1. Groups should then use the remaining cardboard to make a cone to go on the tip of their rocket (the bottom of the bottle). Secure this to the bottle with more tape.

2. Give each group a cork to fit the neck of their bottle. The cork needs to fit securely, so pressure can build up inside the bottle, but not so tight that it won't be forced out to launch the rocket. They can use some tape to wrap around the cork to make it fit more securely if they need.

Rocket launch

Head outside to the launch site. Each group needs to take bicarbonate of soda, paper towels and vinegar with them.
Your launch site needs to be clear of walls, fences and windows, with lots of open space so everyone can keep their distance. Look out for public footpaths, trees and overhead wires - these should all be avoided!

1. Each group should measure a teaspoon of bicarbonate of soda into a paper towel. Roll up the towel into a sausage shape, making sure the powder doesn't spill out. The sausage needs to be skinny enough to fit into the bottle through the neck.

2. Each group needs to fill their bottle halfway with white vinegar. Then, quickly, stuff the parcel of bicarbonate of soda into the bottle, replace the cork securely and turn the bottle upside-down. Stand it on the straws and step back at least two metres. The cork should shoot out and the bottle should fly into the air.

It's a good idea to do a practice run of this step. Cork the bottle, turn it over and stand it up without the bicarbonate of soda added. Allow everyone to get used to this before they do it for real. The paper towel acts as a time release, so that there's enough time to step away before the bottle takes off.
Everyone should come together to discuss their bottle rockets. See if anyone knows why they shot up into the air.
The bicarbonate of soda contains sodium bicarbonate and the vinegar contains acetic acid. When they are mixed, they react together and carbon dioxide forms. The carbon dioxide builds up inside the corked bottle and the pressure forces the cork out and causes the rocket to fly!
Have each group retrieve their rocket and change one feature about the design. This might be the shape of the nose cone, the shape or position of the fins or the size of bottle they use. Then, they should launch the new rocket. See if anyone's rocket flew further or was more stable in the air this time around.
If changing the amount of vinegar or bicarbonate of soda used, this should be done with care. Don't use too much bicarbonate of soda!
Once everyone has completed the experiment, dismantle the rockets, wash out the bottles and recycle the materials used.

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Everyone should get into small groups. Give each group a bottle, tape and three straws. The straws should be taped to the top of the bottle, so they act like a stand for the upside-down bottle. Wrap tape around the bottle to secure them in place, without bending the straws.

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Create a brochure for children at a museum. This brochure must explain what food webs are and a drawn example of a food web. It needs to be colourful for children to want to read it!

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What you will learn from this video What you will learn

A food web is a model of intersecting food chains.

Food of almost any kind can be traced back to the sun.

Decomposers break down dead organisms.

Draw a food chain with 3 steps starting with the Sun.

List 3 different decomposers and explain the important role of decomposers.

Why are the there fewer animals at the top of a food web than the bottom?

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Food chains show how living things in an ecosystem interact! A food web is made of intersecting food chains. Our science video for kids helps you learn!