99% of kids can sit without support at 9.2 months.[0] 97% can crawl by 12 months.[0] Kids in the 12-18 month range don't stay in the crib or a lap all day. [0

99% of kids can sit without support at 9.2 months.[0] 97% can crawl by 12 months.[0] Kids in the 12-18 month range don't stay in the crib or a lap all day. [0] https://cdn.who.int/media/docs/default-source/child-growth/child-growth-standards/indicators/motor-development-milestones/mm_percentiles_table.pdf?sfvrsn=81f3b60b_5 https://cdn.who.int/media/docs/default-source/child-growth/c...