Literally in the past few days 3mo DS has started pushing himself around on his back, to the point where we're having to pull him back onto his playmat every few minutes while he grins in delight at his newfound abilities
I don't want to put him in a playpen as 1) we don't have one and 2) it seems a bit unfair soft mum
Any ideas how we can contain him but still give him the freedom to move?