hi, my very active 8 month old has recently started pulling herself to standing... she does it everywhere, sofa, chairs, table, crib etc. when i put her to bed tonight, she immediately pulled herself up again, holding onto the top of the crib railing. we have cot bumpers, however it only covers lower half of the railings. i'm really worried she'll fall back & hit her head on the top half of the railings (ie. part which is not covered). should i get another set of bumpers for the top portion? however, it may prevent the air flow? or any suggestions what i should do to prevent her from hurting herself. thanks!