BRAINSTORM-- Game Mechanics

Game Mechanics that are fun 'Toys' -- Instead of a game with a defined set of rules and end, I am brainstorming a mechanic for a toy, something that can be played with in any way, for how ever long the payer wishes.

Ideas

1.  Cat Meow/Player Makes sound-- The sound can be used to volly incoming objects away, attract attention from NPC, cause environment evens (Break Glass). Could possibly collect objects to alter the mechanic- eat fish to get rancid breath, eat cat nip for high pitch, sonic meows. 
2. Gravity Resistance (When everything else is affected)-- Gives the player the ability to move in any way including upside-down. Enables them to dodge  objects/enemies, and get to objects. 
3. Sneezing-- Something like this would only work if you were in an environment of neat freaks... you're sneezing power could come from animals that you have to maintain a safe distance from. Some can be social, others antisocial (Run at you verses run away). And you could collect hair and dandruff from them. And with certain charged sneezes (depending on how high your allergy bar is) you can sneeze yourself to higher platforms, but if you have to much you die in a sneezing fit of hives and pain. 
4. A ball is a good example of a toy that can be used in many was since you can kick it, roll it, bounce it, hit people in the face with it... So what happens when you change the physical properties of a ball? Maybe a ball of slime, and exceptionally dense ball that is alive, a ball cover with tentacles that can crawl.... new attributes to them would be the ability to absorb/grab things
5. Chalk that creates what you draw on any surface- draw a party me member? Watch them come to life, draw a hole in the wall, and exit? It will oven up!
6. Instrument that causes events based on your tune
7. A sward you can shape shift depending on what is has slain (can open doors, pick locks, turn to wood, metal, bone, ect.)
8. A slingshot-the power comes from the stones you collect and use with it
9. A Cauldron/Pot that reacts and can solve problems you are being faced with when you put different ingredients in it!
10. The Ability to summon animals (maybe you have a staff or something that allows this)