The registration fee for pre-registered pre-paid competitors is $5 for the first event plus $1 for each additional event. If you do not pre-pay, the registration fee will be $10 for the first event plus $2 for each additional event. Please note that $1 from every competitor will go back to the WCA. If you do not pre-register, you will not be on the guest list and will have to pay to get into the science center in addition to the registration fee. If you would like to explore the venue, you must purchase admission to the science center. Spectators must purchase admission to the venue.