Our family of four will have an 11+ hr. lay over in Paris from 8:45 am- 8:15 PM en route to Africa. We are planning to visit the Catacomb and then rent a bike to explore Paris for the 3rd time, take the River Cruise and climbed up the Eiffel Tower. Since my kids are only 11 and 13 we can't use the Velib, right? Any suggestion which bike rental company should we go? Is it easy to find parkings to these bikes? Also, is it more advisable to take a 1 day Metro Pass as compared to taking taxis? Thank You in advance.