happy brain with headband, arm bands show its biceps, hooping with arms raised on dark background. text train your brain.

brain cartoon cheerful cute head modern sign sticker symbol template vector retro style social media marketing curve characters wrinkled drawing art product pink color internal organ intelligence flat design anthropomorphic smiley face happiness joy moving activity sport hooping standing blue calligraphy dark inspiration banner sign greeting card healthy lifestyle design element exercising creativity motivation enjoyment arms raised headband bicep muscular build muscle strength web banner text message