Knitting looms are different from a knitting machine. A knitting loom can easily be used by a child. They are more for a table top or lap style weaving.
 
The newer long scarves turn out quiet nice on a knitting loom such as pictured. They also make pretty nice afghans by making blocks and sewing them together. If you are creative you will most likely come up with many different ideas with the knitting loom.
 
Most of the looms do come with complete instructions and patterns for projects.
KNITTING KNOBBY, KNITTED CORD SPOOL KNITTER LOOM

KNITTING KNOBBY, KNITTED CORD SPOOL KNITTER LOOM

$3.24
18"Knitting Board,  Small gauge adjustable loom

18"Knitting Board, Small gauge adjustable loom

$27.95
CLOVER "WONDER KNITTER" KNITTING KNOBBY TOOL LOOM ~ FUN

CLOVER "WONDER KNITTER" KNITTING KNOBBY TOOL LOOM ~ FUN

$8.95
Knitting Board 10" Long Knitting Loom w  DVD NEW Wood

Knitting Board 10" Long Knitting Loom w DVD NEW Wood

$27.95
Knitting Board 28" Long Knitting Loom w  DVD NEW Wood

Knitting Board 28" Long Knitting Loom w DVD NEW Wood

$48.00
Knifty Knitter Nifty Set of 4 Round Knitting Looms

Knifty Knitter Nifty Set of 4 Round Knitting Looms

$21.99
Knifty Knitter Nifty 14" Long Knitting Loom YELLOW

Knifty Knitter Nifty 14" Long Knitting Loom YELLOW

$7.99
10"Knitting Board Adjustable Guage Loom-Patterns-How to

10"Knitting Board Adjustable Guage Loom-Patterns-How to

$15.49