Hi, can you recommend sturdy, stable playpen for 5 months old n above? Thanks!

I have a graco pack n play playpen but my boy can only spend at most 10 minutes in it as it feels very constricted. I would suggest getting a play yard instead as they can be more mobile in it when they crawl or cruise around. 5 panels and up would be best. I bought a 6-panel and a 8-panel haenim play yard from carousell at less than $100 - preloved but in good condition!