They can use oher materials to be their ice floes-- balsa wood sheets are rougher than plastic and therefore create a more realistic friction face to the wind than smoothe palastic would.
(balsa wood sheets; create; a more realistic friction face) (balsa wood sheets; are; rougher than plastic) Context(balsa wood sheets are,List([52, 73))):(They; can use; oher materials; to be their ice floes)
balsa wood sheets are,List([52, 73))
balsa wood sheets balsa wood sheets They
create are can use
a more realistic friction face
rougher than plastic
oher materials to be their ice floes