All of these are perfect for kids of all ages! 
Light-Up Eruption- Create a foamy and colorful eruption that resembles toothpaste.  Everything needed for this comes in a reusable light-up Christmas cup.
Fizzy Trees- Make a colorful and festive frozen tree that erupts when a reaction occurs.
Snow Slime- This perfect experiment includes "snow" in the mix. The materials for this come in a tin Christmas tree.
Thirsty Snowman- Why wait for snow when you can make it?  This is an EASY experiment where a reaction produces snow.  Materials to build a snowman are included in a tiny tin case.  
Frozen Silly Putty- A fun experiment that creates blue silly putty.