Sweet? Sour? Salty? Bitter?

For food to have a taste, it must be dissolved in water. There are four basic tastes: sweet, salty, sour and bitter:

SWEET	SOUR	SALTY	BITTER
Like a piece of cake	Like a lemon	Like, well, salt!	Like a cup of bad coffee

All other tastes come from a combination of these four basic tastes. Actually, a fifth basic taste called "Umami" has recently been discovered. Umami is a taste that occurs when foods with glutamate (like MSG) are eaten. Different parts of the tongue can detect all types of tastes. Morever, the simple tongue "taste map" that is found in many textbooks has been criticized for several reasons.The actual organ of taste is called the "taste bud." Each taste bud (and there approximately 10,000 taste buds in humans) is made up of many (between 50-150) receptor cells. Receptor cells live for only 1 to 2 weeks and then are replaced by new receptor cells. Each receptor in a taste bud responds best to one of the basic tastes. A receptor can respond to the other tastes, but it responds strongest to a particular taste.

The Taste Bud Image from Biodidac

Smell

Sink or Float?

Characteristics of Materials

Taste

Sounds of Animals

Colours and Shapes

Source: Fisher-price.com