Lego identifies five types of play – physical, symbolic, with rules, with objects, and pretence. That sounds a lot like the tools that many learning designers working with adults use - role play, simulations and serious games are all increasingly used in adult learning. It seems that play is hard-wired into us as a way to learn, which means educators need to integrate play into learning design. At the same time, we need to ensure that we're not too playful, since many adults