This instructable will detail the brutally easy construction of an I-Spy bottle that you can make in 10 minutes without tools, put on a table, and enthrall kids for, well not an hour, but about 15-45 minutes per head. You might as well make one because it's extremely cheap and easy, and it's cheaper and more fun than an I-Spy book or game.
-A transparent water bottle (the older cylindrical ones work better than the new "eco" ones.)
-enough oats to fill a water bottle
-about 6 to 8 little trinkets (to or three bigger ones, and two or three smaller ones
-a word processor or type writer
-transparent or translucent tape
Step 1: Gather Trinkets
Everyone has them. Look at your work bench, your basement, your spare parts drawer. Wherever. Just remember it has to go in the top of the water bottle. I ended up with stuff like a hair barrette, a Philips bit, a die, polly pocket stuff, a marble, a rock, a paperclip, and a crayon tip.