No toys but one game we use.Slip a bokken down the collar and under the belt. Tie another belt round it like braces.Then perform techniques or sword kata. Your posture better be perfect for each time you "cringe" the bokken will "tell" you. regards koyo
If you do. Retain triangular posture. It is when the shoulders square up a bit that the bokken bites. regards koyo Check out bokken basics aiki ken thread here on map.