i dont think he will be affected if tummy time is give the flick , there are plenty of ways to stimulate him and to keep him happy , its not directly related to crawling so dont stress if he doesnt like it , find something he does and relish his smiles .... i didnt really bother tt with DS but boy did he love a jolly jumper , he crawled at 5.5 months and walked at 15


he will be fine !!!