Science and fun

. Do natural or chemical fertilizers work best?

Can mice learn? (you can pick any animal)
Can people tell artificial smells from real ones?
What brands of bubble gum produce the biggest bubbles?
Does age affect human reaction times?
What is the effect of salt on the boiling temperature of water?
Does shoe design really affect an athlete's jumping height?
What type of grass seed grows the fastest?
Can animals see in the dark better than humans?

What brand of battery lasts the longest?

Does the type of potting soil used in planting affect how fast the plant grows?
What type of food allow mold to grow the fastest?
Does having worms in soil help plants grow faster?
Can plants grow in pots if they are sideways or upside down?