Grumpy Old Geeks Products Fly Baby Product Fly Baby 2 mentions in 1 episode An infant sling the hosts describe as attaching to an airplane tray table and the seat ahead. Mentions 64: Grumpy Old Geeks 3.0! Sorta... Jun 27, 2014 5:36 the product that they were pimping that day was called The Fly Baby 6:08 It's basically a sling slash hammock for your infant.