Guilt

Put him in his back on the playmat. Wrap a cushion around with tinfoil and let him kick it. My son loved the noise. Haven't done it with my daughter yet. She is almost 13 weeks old. She loves to look at the stuff on a playmate and I attach the long pramtoy on the bottom so if she kicks that the toys on the top all swing. They love noise that stage. Let him do it without socks so can feel different texture aswell. I got a simple ball from temu aswell which is easy to hold with her hands. She likes to grab it accidently and just looking at it x
To be honest if you talk to him and do different faces it's stimulating enough for the babies and they learn so much xx

You’re literally doing not a single thing wrong. Babies just want to be on or near you, they couldn’t care less about activities and stimulation at this age. 9 times out of 10 just watching you and the world doing its thing is enough stimulation for babies this young!

Give yourself a break, embrace the contact naps and the sitting on the sofa watching telly with them. It will fly by! (Speaking as a second time mum who doesn’t get to do that this time round 🤪)

I'm an ftm and feel the same way with my 10 week old son. I cried at 6 weeks cos I'd only bought toys that were a SIDS risk so he couldn't play with them, nothing plastic or sensory. But it turns out that he's not that interested anyway at this stage and his favourite toys are bits of mummy: he can chew, suck scratch, kick and climb her. Then fall asleep on her once he's done. Who would have thought mother nature could be such an entertaining toy manufacturer....