Hello, I am new to these boards! I have an 8 week old boy and I was wondering how much activity time babies of this age usually tolerate? I am having trouble finding his window. He usually yawns after about 15 minutes of activity time (total awake time including E is about 45 minutes before the yawning starts). Does this seem about right? Still takes him about 30 minutes to fall asleep after this point (if I am lucky). Thanks!