We made Goblin Gloop!
Translated for Muggles, the proportion is 1 tsp of fibre powder (such as Metamucil - we used a flavoured one for colour and scent) to 1 cup of water.
Microwave for 3-4 minutes. It gets thicker as you microwave it. Let cool before poking it! Trust me on this one. Then play - it is delightfully slimy but not very sticky.
M wrote an acceptance letter to Hogwarts using Microsoft Word:
She also drew some magical creatures, researched plants, and explained how she came to have a particular creature in her wand (all these journal pages plus the more recent ones I haven't photographed should be up on hslaunch for you).
We also made raisins dance for spells class - a buoyancy spell:
(Muggle translation of ingredients: water, raisins, club soda)
We haven't had this much fun with school for ages!!!!