An small empty plastic water bottle with rice grains in that he can chase around - just check it regularly and change it if theres a risk the grains can get out. It can also be put inside an old sock with a knot at the end.
Two toys exactly the same - tuggers are good - so that when he brings one you can show him the other one so that he learns to 'drop' the first one.
An old t shirt knotted up so it doesn't look like a t shirt. (and he doesnt learn all t shirts are toys)
Have a toybox to keep his things in and change them regularly - keep one thats 'your' toy to motivate him later.
Squeaky toys - those 'roadkill' flat ones without any stuffing are really good.
If he's fed dry food....
Start some training using his kibble as rewards - 2 mins spent thinking is as tiring as 10 mins playing.
When you feed him hide his kibble around the house so he has to 'work' for his food - or put a ball into his bowl with the kibble - it will take longer to eat.
Play hide the kibble underneath something - let him see you do it at first till he 'gets' the game and then slowly make it more difficult.
Buy a number of bone 'shanks' where they are hollow inside or sometimes filled with a paste. Remove the paste and smear with marmite or fill with soaked kibble. Freeze. Give straight from the freezer.
Give him ice cubes to play with. Freeze carrots as a treat. Give frozen.
Have lead work practices indoors where the idea is to keep his focus on you at all times - so you have to be really interesting to him. Much easier to get this done indoors than outside where there are so many distractions.
Read 'how to train your dog like a pro' - excellent book.