If aliens ever invade the earth, it might not be so bad as long as they’re all from Planet Tickle. The Tickle Monster ($12) has come to our world to bring joy to children through tickling, of course. The rhyming pages build up to each new body part that is about to be tickled. Kids will love the anticipation as they wait to find out what the Tickle Monster has in store for them next. This interactive book gets even more fun and hands-on when you pick up some Tickle Monster Mitts ($11) to go with it.