Yes - a good toy rotation on a weekly basis is necessary to help prevent boredom. And a variety of materials (i.e. not just plastic or wood) but incorporate different textures, and definitely start him with some foraging toys to help stimulate his mind, and lots of preening type toys to encourage positive (aka not over indulging himself) preening.
Merlin loves foraging boxes, wreaths with fleece bits, birdie bagels, straws, cholla and yucca woods, seagrass cord - and more. There's a whole world of different textures for your little one to enjoy
And if you can bring him to different places/car rides - you haven't ridden a car properly until you've enjoyed it with a grey making sound effects Merlin has a small dog cage (his temp/vacation/car cage) he rides in, and loves it.