What will be the best toys/games a dad can get for her 8 month old daughter. Like my daughter loves to see train running on track. what are other such toys/games I can get for her?

At 8 months babies are learning a ton about the world around them. (Often by putting it in their mouth!). Your baby should also be sitting up by this time. I would suggest instead of toys you can use products found around the house like paper, wooden spoons, pots and pans. One fun game to try is to play and stack plastic containers. You can also consider a soft book or some colourful building blocks, something the baby can easily hold and play with while sitting.