dt2 is a climber. he's only 10mo but can climb the side of the bath/radiator/his cot. he can't keep still even when bf. and in his ikea high chair he can go from sitting to standing in under 2 seconds even though we wedge him in with the inflatable cushion and use the lap strap, perhaps because we can't struggle to get the lap belt to stay tight. any tips? ds1 used this chair without problems, dt1 is fine in hers, but I'm at a loss with dt2. currently it's just not safe as my attention is already divided with dt1.