Oakland Discovery Center

Materials: • 10'' 1x2'' wood • Matt board • 11/2''x 3'' cardboard tube • Hobby motor • AA Battery • Wide rubber band • Wire (solid core preferred) • Cloths pins • Aluminum foil   • Tape Tools: • Hot glue gun • Small wood saw • Utility knife • Wire strippers • Compas • Circle cutter (optional, available from cart and art supply stores ) Cut a 5-6'' matt board circle using a compass and a utility knife or a circle cutter to make your shutter disk. Make sure that you have a method of marking the center and the radial slot before cutting your circle out.  Use a nail to poke a hole in the center of your shutter disk. The nail should be slightly smaller than your motor shaft. Cut a 1/8'' to 1/4'' slot about 1/3 of the way through the disk.  One slot will allow good viewing of most things, but if you want to look at something that moves particularly fast you may want 2 or 3 slots.

Materials: 5 mm or 10 mm white diffused LED light (We got ours from Evil mad Scientist , which unfortunately they are no longer selling. Other suppliers  All Electronics ,  Goldmine Electronics , or Amazon) 3V lithium coin battery (we got ours from sciplus.com item #  40919) copper tape (found in the gardening section of hardware stores as an anti snail/ slug product or alternatively in 1/4'' form on Amazon ) electrical vinyl tape jumbo craft stick Tools: Scissors Ruler (optional) Cut copper tape long enough to go down the length of the craft stick and to wrap about 1/2'' to the other side. Place your coin battery on to the short piece of copper tape you wrapped over the end of the stick with the positive side of the battery facing up, negative side down touching the copper tape.  Take a shorter piece of copper tape and fold each end over about .75'' each side, leaving the middle section with adhesive, and adhere it to the craft stick

Materials: • 8'' 1x2'' pine • Plastic cup or bottle • Masking tape • Aluminum foil • Hobby motor • 1 AA battery • Solid core wire (we like telephone wire) • Thumb tacks • A broccoli rubber band, or inner tube cut off Tools: • Small wood saw • Scissors • Wire strippers • A hammer • Hot glue gun First take a piece of foil and fold it to make a 2" x .75'' strip and tack it loosely in place on one side of the handle. Add a second tack under the end of the foil (not through it). Then twist two lengths of telephone wire (with ends stripped) onto each tack so the exposed copper touches the tack. Hammer the tacks in to lock the wires in place; this completes the fan's switch. To complete the circuit cut and add a third piece of wire and create a path that goes from the switch to the motor to the battery and back to the switch.  Stretch a broccoli rubber band or a cut off piece of inner tube around the battery, and simply s