Here are four of my family's favorite wooden push and pull toys.
1.) Haba Ducky Duck is a cute pulling toy that I got on Amazon. The two yellow feet turn as you pull the toy, giving the duck a waddling look.
2.) PlanToys Swimming Seal is a great push toy. The seal's fins also move when the seal is pushed. I purchased this when it came on sale at Zulily. Make sure you click the "notify me" button under PlanToys on zulily.com to ensure that you get an email the night before the products are featured since they can sell out fast. You do pay for shipping on Zulily but if you're buying several toys at once it can be worth it.
3.) PlanToys Sit N Walk Puppy is a fun toy that children can make "sit" or lie flat to pull around.
4.) PlanToys Pull-Along Caterpillar is one of their many pull-along toys that children have a blast with. You can find more on yoyo.com and amazon.com.