I too would be concerned with the rotary blade. You could designate a place high and out of the way to store when not in use. Maybe in a cute container? You could get in the habit of using it during nap/bedtime. Then have all of your fabric ready to sew while the kids are playing. Set all of your pieces aside and trim all at once then return the cutter to it's "special place". You can make this work, think of all the times you are cooking and using a knife with the kids around it is the same thing. Safety first! Have fun.