DS is 20 weeks old and I'm struggling to get him into a routine of daytime naps. I try to get him to sleep before he gets overtired but he's so distractable that he's constantly waking. He has a 2 1/2 year old sister who is rather noisy (as toddlers are) which doesn't help with creating an environment conducive to sleep. He will sleep lightly on my lap when dd has her afternoon nap but she's trying to drop this. I've tried doing quiet activities and reading dd stories with dd whilst trying to get ds to nap but this doesn't help.
Any ideas / experience most gratefully received. Thanks