A mirror! You can get a cheap full length mirror and put it sideways on the wall near the floor (you can probably Google this if it doesn't make sense, I'm not sure how else to describe it at the moment!)
A good sensory toy: https://www.amazon.com/dp/B000CBURPU/ref=cm_sw_r_cp_apa_i_CvknFbMX423TY
Toys that he might need to grow into but should be good starting around 14-18 months: https://www.amazon.com/dp/B07C78C3VZ/ref=cm_sw_r_cp_apa_i_1tknFb505ZNF9
https://www.amazon.com/dp/B00005LOXV/ref=cm_sw_r_cp_apa_i_jwknFbRTWWRTE
https://www.amazon.com/dp/B07WDWJNBZ/ref=cm_sw_r_cp_apa_i_lxknFbEGPXAEW
https://www.amazon.com/dp/B07S28QV8P/ref=cm_sw_r_cp_apa_i_DxknFbTKEW7VF
And toys that would be good for a 2 year old, but you could introduce them early: https://www.amazon.com/dp/B07811WXDH/ref=cm_sw_r_cp_apa_i_XuknFbHT5GEQP
https://www.amazon.com/dp/B000068CKY/ref=cm_sw_r_cp_apa_i_6xknFb5Z63KDQ
He was pretty fascinated by this rainmaker toy at about 6 weeks.