ICE CREAM in 5 minutes :) In a small Ziplock bag, put: 1/2 C. half and half (milk works too) 1 Tbps. sugar 1 tsp. vanilla... want to try frozen fruit in it next time, too. Insert that bag into a larger, one gallon Ziplock filled with ice and salt. Shake the bag for five minutes. Kids love that part! Then, remove the smaller bag which should have turned into ice cream.
Crayon hot rocks: If you have not done this yet, you need to. Simply warm up the rocks in the oven (I did 220 for 10 minutes), then put them on a stack of newspapers (or something else you don't care if it gets crayon in it) and let the little ones go to town. Just remind them it is hot. I have done it with 2 1/2 year olds with no problem. My little lady often brings in rocks for me to "cook" so she can paint them