Ds, 17 months, has never been strapped in, never needed to.
He's now worked out that he can stand on the reinforcing bar under the seat and can virtually climb out.
I'm not sure strapping him in will stop him doing this but DH thinks that taking out the reinforcing bar will solve the problem.
Anyone else had this problem and can offer advice, coz I'm not sure taking the bar out is the right thing to do - I don't want the thing to fall apart at tea tonight!