Teehee – I’m not usually one who enjoys puns but I couldn’t resist. I hope my sense of humor (or the lack of it) doesn’t put you off reading this further.
You can be pretty creative with eggs and they can lend themselves to so much, not just the cake. So if you find yourself with lots of eggs (after a trip to Costco or the like) then maybe you could do a few of these science-based demos.
If the birthday party is around easter these demos could link in well. First you could get the kids to enjoy themselves in non-science based games – egg treasure hunt and egg painting. You can then go on to incorporate science-based egg themes too.
Egg Engineering – First you can give all the kids an egg (or just pull a couple of the kids out to do the demo). Ask them to squeeze the egg as hard as they can and see what happens. Once the kids are wowed at how the structure of the egg is so strong you can then get them to test it – start ‘light’ with things such as feathers and cardboard; and then work up to ‘heavy’ objects like bricks. Here is a video of someone using bricks.
You could even get them walking on egg shells for fun!
Structural engineers have incorporated this dome structure into bridges, tunnels, and buildings (such as the Duomo in Florence) because of its great strength.
Can an egg fit into a bottle? Ask the kids the question and they’ll probably say “yes” – break the egg and pour it into the bottle. But what if you want to fit a whole egg into the bottle without it breaking? This question is a lot trickier to answer and will leave them stumped. I used to do this a lot at Mad Science parties and the kids loved it.
Using a peeled hard-boiled egg get the kids to try pushing it into the bottle without it breaking. It won’t work. So how do you do it? Light a match, pop it into the bottle, quickly place the egg on top of the bottle (before the flame disappears) and plop, the egg should squeeze itself into the bottle.
The below video shows the demo in action and gives a good explanation of the science. Tip: you could use a bit of vaseline around the edge of the bottle opening to make for an easier transition.
Though art is considered a creative process there is lots of chemistry that happens “behind the scenes” and we can show this using eggs. Egg tempera is an old painting technique which relies on the use of egg yolks to act as a binder. Paints require a pigment (to give the colour), a binder (to hold the pigment together and let it stick to the surface), and water to give the usable paste-like form. It is the chemical properties of these individual things that allow for their role. The egg has proteins which form chemical bonds with the surface, it also has water which allows for quick evaporation and drying time.
You can get the kids to make their own paints and pieces of art, which is great party activity. I’ve found this video which shows a really simple, non-toxic and kid friendly way of making egg tempera paints (all you need is egg yolk, vinegar and food dye).
(N.B. Make sure you remove the yolk from the sac)
There are loads more eggs-periments (sorry for another pun) which I’m sure I’ll include over time on other posts! I did want to finish with a thought on decorations since no party is complete without them.
Before the day of the party you can carry out some wonderful science related craft projects with your child that will add sparkle and lots of colour to the party. I found these two lovely ideas: Crystal Easter Egg and Sugar and String Easter Eggs
You could include instructions to do this at home in the party bags.