Why not just try? Mine started really young, probably by 18 months. Theyd sit in boosters at the kitchen island and help dump and 'mix', sprinkle spices, etc. I'd let them play with a bowl of scraps and water or eat a snack while I did other things. It was pretty much our dinner routine. Granted, neither was a thrower or particularly crazy. My 3 year old now tells me he's my 'sous chef' and keeps me company whenever I cook (his 4 year old brother is no longer as interested, unless it's cookies or something).