尽情地玩英语

楼上的专家应该知道这个说法吧？to your heart's content？它的意思是as much as you want:比如：a supervised play area where children can run around to their heart's content（以上释义来自于OALD）尽情玩耍： to enjoy yourself to your heart's content

We can enjoy ourselves

Enjoy yourself to the fullest! 这是最适合的表达，老外就这么说

enjoy yourself

play as much as one likes尽情 [简明汉英词典]as much as one likes

anything shaped like a ball

名词 ball:1.round object that is hit or thrown or kicked in games2.a solid projectile that is shot by a musket同义词：musket ball3.an object with a spherical shape同义词：globe, orb4.the people assembled at a lavish formal dance5.one of the two male reproductive glands that produce spermatozoa and secrete androgens同义词：testis, testicle, orchis, ballock, bollock, nut, egg6.a spherical object used as a plaything7.United States comedienne best known as the star of a popular television program (1911-1989)同义词：Lucille Ball8.a compact mass同义词：clod, glob, lump, clump, chunk9.a lavish dance requiring formal attire同义词：formal10.a more or less rounded anatomical body or mass11.the game of baseball12.a pitch that is not in the strike zone动词 ball:1.form into a ball by winding or rolling

have a good time