This is a quick and easy experiment where students may be introduced to the concept of buoyancy, while also practicing comparing times and counting by seconds. This experiment works well in small groups. To complete the experiment, each group needs worksheets, a bin of water, and the various materials listed on the worksheet. The students then take turns placing each item at the surface of the water, and then count how long it takes the item to sink. If you have ideas for other items you would like added to the worksheet, just send me an email or leave a comment!