Never to young to get em used to the "rules" and let them do the fun parts (that are not dangerous) I have an 18 mth old quilting buddy (a cousin) and she loves to sit on my lap as I sew sometimes, loves to hand me the next piece lol. Also teach a 10 yr old cousin, a 10 yr old neighbor girl (she has 3 brothers and likes to escape sometimes) on the sewing machine, and a little bit of cutting. My 5 yr old loves all of it (watching only with cutting and sewing machine).