Toys that you can model use with (so LO can copy to play with as she develops) are good....e.g. stacking cups, toy phones, musical instruments (shakers). Books (lift the flap) are very good too.
here are some suggestions from the baby centre website.
Activity board: Many babies adore activity boards that can be attached to a cot rail. They come with parts that move and spin, giving your baby a place to practise her hand-eye coordination. She's also getting the idea that you can make things happen to objects -- so poking, twisting, squeezing, shaking, dropping, and opening things will all fascinate her.
Soft dolls or stuffed animals: Babies this age often develop an attachment to a favourite toy or blanket. Experts agree that comforters are a good thing as they help your child to feel secure in new or anxiety-provoking situations. Avoid toys with ribbons, plastic eyes, thread, or anything that can be pulled off and put into your child's mouth. And don't get dolls so big they're hard for your baby to pick up and explore.
Balls: Balls are fun for just about any age. Lightweight fabric balls suit this particular age well. Roll one back and forth between the two of you on the floor, or when she's older, toss it across the room so she can crawl after it.
Household items: Look no farther than your kitchen cupboard for some of your baby's favourite items. A wooden spoon or plastic bowl will entertain your baby for a long time. Open the cupboard while you're preparing a meal and your baby will pull out a few utensils of her own and whip up something alongside you.
Wood or soft blocks: Show your baby how to stack a few blocks, and then knock them down. Pile them into containers for her -- and dump them out. She'll get the idea. Stacking blocks and filling and dumping games are wildly popular in this age group.
Moving toys: As your baby begins to crawl and move around, she'll be more interested in toys that do the same. Find some sturdy cars she can push around on the carpet. Or toys that pop up when your baby pushes just the right spot.
Books: This is the age at which reading becomes more interactive and fun for both of you. Cloth or board books work well now. After you read the book, you can pass it to her so she can take a turn flipping the pages and 'reading' to you.
Good luck with the present buying hun x x