Making dinosaur fossils - bury in sand and let the kiddos dig to find them. It would be cute to do it without them knowing so they're extra surprised when they discover them as they're playing in the sand box!
G - Sludge! - super sensory play with COOKED cornstarch and water! 3 cups of corn starch (corn flour in the UK) 8 cups of hot water cup of dish detergent & a good squirt of paint or food colouring (optional)
Best DIY Slime Recipes - Cool and Easy Slime Recipe Ideas Without Glue, Without Borax, For Kids, With Liquid Starch, Cornstarch and Laundry Detergent - How to Make Slime at Home - Fun Crafts and DIY P (Cool Crafts For Teenagers)