This idea for a fun summer activity hits all the right notes. It is inexpensive, involving a few little trinkets either purchased new or dug out from the bottom of the toy box. It involves a big block of ice on a hot summer day. And it involves smashing stuff with a hammer. What's not to love? The Weekend Homemaker has found a way to fight off summer boredom and release pent-up energy in one fell swoop. By taking a few waterproof toys and freezing them in a container of water overnight, your kids can chip away at their ultimate goal, which is tantalizingly visible encased in a solid block of ice. Be sure to provide adult supervision, as they will need to be swinging a real hammer to get the job done. Eye protection is also a must here as well. We think this idea, incorporated into a treasure hunt of some sort, would make for a memorable summer afternoon. Step by step instructions can be found at the Weekend Homemaker.