How old is she? It's important not to over-encourage/push your little ones too soon, as damage can occur to open growth plates, especially jumping high/hard and too much running. Growth plates normally close somewhere between 8-14 months but the only way to know for sure is by having your vet do Xrays.
That said, Lakeside Collection online has an agility set for 24.95:
| Lakeside Collection
It's got a tunnel, weave poles, and a jump (ground level for beginners), and a pause box. cute.
http://images.lakeside.com/images/products/5/AKG_MN.jpg