This week, you will be making a seed ball catapult. Plants are vital for our eco system and what better way to launch them than using a catapults! So we are combining physics and biology for this week’s experiment. In your kit you should have:
  • 6 loom bands
  • 6 lollipop sticks
  • 1 spoon
  • 1 bag of clay
  • 1 bag of wildflower seed and soil mix
  • 1 small bag

The Catapult

    • Stack 4 of the lollipop sticks together in a pile and secure with 1 loom band on each end.
    • Put another lollipop stick behind the handle of the spoon, so the bowl of the spoon is sticking out above the top or the lollipop stick. Use a loom band to attach these together.
    • Put the final lollipop stick underneath the one attached to the spoon, and attach both sticks and the spoon handle together using a loom band.
    • Separate the bottom stick from the top stick and slide the 4 stacked lollipop sticks in between, sideways, making an open ‘mouth’ with the spoon on top – like this –
  • Secure it by attaching 2 loom bands in a ‘x’ shape where the stack of 4 sticks meets the spoon.
  • Try putting a small ball of paper in your spoon and gently pushing it back then releasing so the paper flies out!
Chemical Cress will now explain a little bit about the science behind the catapult. Join us afterwards for making the seed balls! [embedyt][/embedyt]

The Seed Balls

You may want to do this bit on a mat, or outside. You will need a plate or bowl to put the seeds in.
  • Split your ball of clay into 5 or 6 little balls, or more if you make them a bit smaller.
  • Pour out your seed mix into a plate or bowl.
  • Roll the clay balls in the seed mix, you may need to squish the seeds into the clay!
  • Put the finished balls into the small bag provided.
  • Find a green space, this could be in your garden or a green space near your house that needs brightening up!
  • Place a seed ball in your catapult, make sure you aren’t going to hit anyone, and fire!
Here’s Chemical Cress to talk about why wildflowers are so important – [embedyt][/embedyt]

Bonus video

Why are plants and trees important? [embedyt][/embedyt] Enjoyed this kit? Visit our shop for more weekly science kits    

Waterloo House, Dominion Rd,
Twerton, Bath BA2 1DW