I don't know where you can find near Marj Al Hamam but my friend found a bucket hat in @The Outfit . Check out @Taqyeh as well they have a wide selection!

Where can I buy girls basketball shorts?

@The Outfit they have Vertex Basketball Jersey Shorts for 18 JD

Where can I find a metal water bottle?

Typo stores closed down in amman but theres @The Outfit they have a good selection

Where can I find huge flamingo inflatable?

@The Outfit

Where can I find masks for kids, for example with cool illustrations?

@The Outfit has lovely masks for kids. It's located in Mecca St. right next to Al-Sha'b Circle.

Where can I find large inflatable pool for adults?

@The Outfit Intex Inflatable Peacock Island Pool Float JOD 39.00

Where can I find kids lunchbox?

@The Outfit

Where can I buy a music box keychain with custom music, or anything related to Game of Thrones?

@The Outfit they have Funko Pop! Game of Thrones - Arya with Two Headed Spear for 17 JD

Where can I find ninja costume for girls?

@The Outfit has them. its for 23.20 jds and if you order it online you get 15% off

Where can I find a plastic kids pool?

@The Outfit

Where can I find a giant inflatable pool floats?

@The Outfit

Where can I find beach balls?

@The Outfit

Where can I find a summer job that pays well and isn’t too serious?

Send your CV to info@The Outfit fit.me they are looking for sales people for their shop @The Outfit

Where can I find Jansport backpacks?

@The Outfit

Where can I find big lunch boxes with compartments for babies?

@The Outfit