Jennifer Lopez and Marc Anthony made a visit to celebrity baby boutique, Petit Tresor on Wednesday afternoon. The heavily rumored expectant parents dropped $50,000 on materials for the impending birth of their fraternal twins.

“Petit Tresor will be designing their baby nursery and the theme is nursery rhymes,” says an OK! Magazine source.

The couple spent two hours picking out custom-made cribs, changing tables, other accessories.

“There will also be custom-painted murals on the walls,” the source adds.

Jenn and Marc’s baby registry features strollers, Moses baskets, a complete layette, blankets, and infant toys.