The block play activities involve three stages, including (2):
Stage 1: Discovering ( Infants and toddlers explore blocks by mouthing, touching, feeling, holding and them)
Stage 2: Carrying (Begins in toddlers under 24 months. They carry blocks around, explore them with senses, and throw them around)
Stage 3: 15-month-olds can stack two blocks, 18-month-olds can stack four blocks, and 24-month-olds can stack about five blocks.