Your state plan (Bright Start) offers a good array of funds, at reasonable expense ratios. These include both passively managed funds (referred to as Index) and some actively managed funds – these include some Vanguard funds, such as an S&P index fund at 0.10% annual investment management fee.
Your 4.95% state tax deduction will likely more than offset your investment fees, if you simply spread the 4.95% over an average 10-year holding period since your child is now age 10. So that will basically provide 0.50% per year.
Note it appears that TODAY is the deadline for funding the account to get the 2017 state tax benefit based on the information shown in the Tax Center on that site.