Summer Fun at grandma's - Treasure Rocks!!!

If you are looking for something fun to do with the children you love for Children's Day - consider trying this idea I found on Pinterest . . . Treasure Rocks!

What are, "Treasure Rocks", you ask? Well, you take a little toy, mix some baking soda and water to make a clay/paste which you wrap around the small toy. Let dry overnight and hide outside. When your grandchildren find them, they can spray vinegar on them to watch the "rock" dissolve - in a very fizzy and fun way - to show the toy inside!

Sounds like great fun to me! What do you think?