There is a book about a boy named Todd and a killer puppet or killer doll. Anyone know it? What is the name?

I read it 20 years ago and I can't remember the name. I was talking to someone who remembers it as well and now we HAVE to know! :)

There is a book about a boy named Todd and a killer puppet or killer doll. Anyone know it? What is the name?
try asking this question at www.whatsthatbook.com or www.auntbook.com hopefully someone there will recognise it