Attached is a liitle topology I created for GNS3. You can test BGP, EIGRP and OSPF protocols. Test route summarization, route filtering, eBGP and iBGP, authentication for EIGRP, OSPF and BGP. Play with peer groups and route reflectors. You can as creative as you want.
Forgot to mention, the loopback interfaces on R1 and R2 represent internet routes. You can always add more if you wish. My original plan was for AS65100 to be assigned the 126.96.36.199/16 class B network and AS 65200 the 188.8.131.52/18 class C networks. Of course you can change these to anything you like to fit your creative network scenario.