Quick,easy and cheap.
Make your own.
Use any square-ish pole/landscape timbers work great they come in 8' length cut in half drill holes through every 3" any 2x4 or scrap wood put 4 legs on [nail one on each side] or 2 longer legs[ H] paint add jump cups

Pvc poles from a DIY store

plywood-cut length wise in 3 pieces, that gives you a top and 2 sides use scrap wood as braces nail together paint[brick wall]

2x4- drill holes through cut 6 inches off each end nail to bottom[opposite direction T ] for feet. Fill holes with plastic flowers from dollor store.

Metal or plastic 55 gallon drums-turned on sides or standing up right-how high do you want to jump?

Plywood- cut 1 piece in a circle then cut circle in half=ends. Cut second piece length wise into 5 strips nail strips to half circle ends, cover with carpet remnant=rolltop.

Dollar store plastc table cloth=Water jump.

Fancy wing standards-Buy a panel of PVC fence [DIY store] Cut lengthwise into 2 1/2' strips nail to standard poles as above.

press board [plywoods to heavy] cut into half twice nail together to create a box. Nail to 2x4's up on opposite sides. more press boards to make a roof,another 2x4 on outside edge with holes drilled for jump cups. Wishing well standard.

Use your imagination the possibilities are endless.