Decompression ideas

Hi,

just wondering what decompression activities people use with 4-5yo. My son is like a pressure cooker and I can see he is struggling but he wants 1-2-1 attention because he is obviously uncomfortable with the feeling. Things we try include dens, fidget toys, audiobooks but whilst he probably needs time alone he desperately wants me with him (but not his little sister, she can’t be left alone as she is 21months).

Have there been previous posts sharing ideas? I’m new to the site.

Thanks I’m advance