Put sticks, stones and pinecones, and other gardens items in a bowl of water. What sinks or floats? What changes? Can you make the stone go cowabanga!
Use plastic cups / containers and put one of each item (sticks, stones or pinecones in and out ).
Stick tower challenge.
Who can build the tallest free standing stick tower? Take a picture of your tower when you have finished and we can share it with the class.