Slingshot-A slingshot or catapult is normally a small hand-powered projectile weapon. The classic form consists of a Y-shaped frame held in the off hand (nondominant hand), with two natural-rubber strips attached to the uprights. The other ends of the strips lead back to a pocket that holds the projectile. The dominant hand grasps the pocket and draws it back to the desired extent to provide power for the projectile - up to a full span of the arm with sufficiently long bands.
Pick-up sticks or pick-a-stick is a game of physical and mental skill. A bundle of "sticks", between 8 and 20 centimeters long, are held in a loose bunch and released on a table top, falling in random disarray. Each player, in turn, must remove a stick from the pile without disturbing the remaining ones. One root of the name "pick-up sticks" may be the line of a children's nursery rhyme "...five, six, pick-up sticks!" The game has spawned several variations such as Jackstraws (or Jack Straws), Spellicans, and Spillikins.
The sticks can be made from ivory, bone, wood, bamboo, straw, reed, rush, yarrow, or plastics.
Some Haida First Nation pick-up sticks are plain maple wood; they may also be decorated with abalone shell and copper.
Rubik's Cube-In a classic Rubik's Cube, each of the six faces is covered by nine stickers, each of one of six solid colours: white, red, blue, orange, green, and yellow. In currently sold models, white is opposite yellow, blue is opposite green, and orange is opposite red, and the red, white and blue are arranged in that order in a clockwise arrangement. On early cubes, the position of the colours varied from cube to cube. An internal pivot mechanism enables each face to turn independently, thus mixing up the colours. For the puzzle to be solved, each face must be returned to have only one colour. Similar puzzles have now been produced with various numbers of sides, dimensions, and stickers, not all of them by Rubik.