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  baby is born
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  may stand alone without support for a short time. Toddlers may climb stairs on hands and knees. They can sit in small chair for a short time.
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  experiments with actions never tried before. is able to fit round block into round hole and form board. may repeat sound without understanding the meaning of sounds.
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  may be able to walk sideways. places round pegs in a peg board. may show hand preference in some activities.
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  gradually refines concepts. begins to figure things out through thought processing. vocabulary increases to six to ten words.
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  runs without falling often. jumps forward and in place. holds two objects in hand easily.
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  progresses from simple imitation to imaginitive play. can remember familiar objects without seeing them. has vocabulary of about 20 words.
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  holds crayons with thumb and finger. can open screw type closures. snips paper with scissors.
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  has vocabulary of 50 or more words. is about to ask for things using simple words. imitates parents words and inflections.
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  can remove wrapping from gum and candy. climbs everywhere. climbs jungle gym with fair amount of ease.
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  becomes increasingly interested in children's tv shows. enjoys playing house and imitating family situations. can follow two-step commands.
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  can zip and unzip things. can hold a pencil with thumb and forefingers. and can build a tower of 6-8 cubes.
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  uses verbal commands. can say full name when asked.