Question
i want instruction on making a casket spray for an infant's
casket.  it is small and i am not sure what materials i will need

Answer
Basically a casket spray for an infant ( depends on the actual length of the casket ) is a larger corsage. Some florists even make a large corsage and place it on the casket. If you wish to have the flowers in foam, Oasis makes a product called an igloo.  It is a small round igloo shaped dome with foam within it's cage.  I would use the smaller leaves off of a Leather/Baker's Fern or Ming Fern and small flowers such as mini-carns, baby's breath, and spray roses.  Use corsage ribbon as an accent. If you go the route of a corsage - there are three methods - wire & tape, glue, and/or a combo of wiring, taping, & gluing.  I've even use a velcro wrist corsage and glued leaves & flowers and then cut the velcro straps off and placed the corsage part on the casket.  If you need step by step instructions on how to create corsages, please feel free to ask and state whether you wish the glue method or the wiring and taping or the combo.  My condolences on the lost of an infant.