Yes, your Wealthbuilder account will receive dividends from the holdings. The income from your holdings will get added to the cash component of your account. You will see these via the Dividends & Interest tab and Deposits & Withdrawals tab within the My Account or quick links section. Dividends will be invested in more securities when the cash balance is large enough to trade.
Wealthbuilder accounts are not able to withdraw the dividends until the account balance exceeds $10,000.