I am a SAHD 3 days a week, I love it. My boy is 16 months now, been doing this since he was born! Like someone else said, just be there, have floor time, give baths and enjoy it while you can. I also have teenagers...13 and 16....
At 8 months my lil guy loved interactive toys like the one where you try and figure out what shapes to put inwhat holes, he also liked it when I would play guitar for him, or just have him sit on my lap and watch a tv show. He loved Food Network! Now he's learning to walk and stuff, so we hit the park every day. He actually likes being chuaffered in his stroller best!