ok ladies got a question...my son is 4 1/2 months now and he has been sleeping in his play bin now…

ok ladies got a question...my son is 4 1/2 months now and he has been sleeping in his play bin now for almost two weeks...and had started sleeping through the night at about 7 weeks...even when he slept with us he moved so much in his sleep that now that he sleeps by himself he moves soooo much it wakes him...any tips on how to get him to sleep better? iv tried clothes,no clothes, covers, no covers ,ect...and my and I put a pillow at the bottom so he can feel something against him...I dunno what to do