You think building a strong relationship with my toddler can boost her IQ?

Yes, it does. Not only does bonding with your child boost his confidence, it will also ease his fears and hesitations and prompt him to ask more questions and be more open about their feelings. It also depends on the type of activities that you perform with your child when you spend quality time with him. For example, I read a lot with my daughter whenever I am free and I can already see that she can read sentences on her own even though she's just 4. Other things that I do with her is watch informative shows with her on Discovery, which not only interest her, she also has so many questions to ask :)